Tested-by: Xie,WeiX < weix....@intel.com> Regards, Xie Wei
> -----Original Message----- > From: Zhang,Alvin [mailto:alvinx.zh...@intel.com] > Sent: Friday, January 15, 2021 10:31 AM > To: Guo, Jia <jia....@intel.com>; Wang, Haiyue <haiyue.w...@intel.com>; > Xie, WeiX <weix....@intel.com> > Cc: dev@dpdk.org; Zhang, AlvinX <alvinx.zh...@intel.com>; > sta...@dpdk.org > Subject: [PATCH v2] net/ixgbe: fix configuration of max frame size > > From: Alvin Zhang <alvinx.zh...@intel.com> > > For 82599 NIC, jumbo frame feature is not supported in IOV mode, but if a VF > requests to configure the frame size to that not bigger than > RTE_ETHER_MAX_LEN, the PMD should not return -1. > This patch keeps ixgbe PMD's handling mode consistent with kernel driver in > above situation. > > In addition, the value set by the command IXGBE_VF_SET_LPE represents > the max frame size, not the mtu. > > Fixes: 1b9ea09c067b ("ixgbe: support X550") > Fixes: 95a27b3ba5f5 ("net/ixgbe: enable jumbo frame for VF") > Cc: sta...@dpdk.org > > Signed-off-by: Alvin Zhang <alvinx.zh...@intel.com> > --- > drivers/net/ixgbe/ixgbe_pf.c | 25 ++++++++++++++----------- > 1 file changed, 14 insertions(+), 11 deletions(-) > > diff --git a/drivers/net/ixgbe/ixgbe_pf.c b/drivers/net/ixgbe/ixgbe_pf.c > index 833863a..4cedaa5 100644 > --- a/drivers/net/ixgbe/ixgbe_pf.c > +++ b/drivers/net/ixgbe/ixgbe_pf.c > @@ -555,27 +555,30 @@ int ixgbe_pf_host_configure(struct rte_eth_dev > *eth_dev) ixgbe_set_vf_lpe(struct rte_eth_dev *dev, __rte_unused > uint32_t vf, uint32_t *msgbuf) { > struct ixgbe_hw *hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data- > >dev_private); > - uint32_t new_mtu = msgbuf[1]; > - uint32_t max_frs; > + uint32_t max_frame = msgbuf[1]; > + uint32_t cur_frame_size; > uint32_t hlreg0; > - int max_frame = new_mtu + RTE_ETHER_HDR_LEN + > RTE_ETHER_CRC_LEN; > > /* X540 and X550 support jumbo frames in IOV mode */ > if (hw->mac.type != ixgbe_mac_X540 && > hw->mac.type != ixgbe_mac_X550 && > hw->mac.type != ixgbe_mac_X550EM_x && > - hw->mac.type != ixgbe_mac_X550EM_a) > - return -1; > + hw->mac.type != ixgbe_mac_X550EM_a) { > + if (max_frame > dev->data- > >dev_conf.rxmode.max_rx_pkt_len) > + return -1; > + > + return 0; > + } > > if (max_frame < RTE_ETHER_MIN_LEN || > max_frame > > RTE_ETHER_MAX_JUMBO_FRAME_LEN) > return -1; > > - max_frs = (IXGBE_READ_REG(hw, IXGBE_MAXFRS) & > - IXGBE_MHADD_MFS_MASK) >> > IXGBE_MHADD_MFS_SHIFT; > - if (max_frs < new_mtu) { > + cur_frame_size = (IXGBE_READ_REG(hw, IXGBE_MAXFRS) & > + IXGBE_MHADD_MFS_MASK) >> > IXGBE_MHADD_MFS_SHIFT; > + if (cur_frame_size < max_frame) { > hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0); > - if (new_mtu > RTE_ETHER_MAX_LEN) { > + if (max_frame > RTE_ETHER_MAX_LEN) { > dev->data->dev_conf.rxmode.offloads |= > DEV_RX_OFFLOAD_JUMBO_FRAME; > hlreg0 |= IXGBE_HLREG0_JUMBOEN; > @@ -586,8 +589,8 @@ int ixgbe_pf_host_configure(struct rte_eth_dev > *eth_dev) > } > IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0); > > - max_frs = new_mtu << IXGBE_MHADD_MFS_SHIFT; > - IXGBE_WRITE_REG(hw, IXGBE_MAXFRS, max_frs); > + IXGBE_WRITE_REG(hw, IXGBE_MAXFRS, > + max_frame << IXGBE_MHADD_MFS_SHIFT); > } > > return 0; > -- > 1.8.3.1
